MOUNTAIN LAUREL
(Kalmia Latifolia)

This tree belongs to the heath family and not to the laurels, as the name seems to imply. The same is true of rhododendron. The kalmia genus has five or six species in this country, but only one of tree size, and then only when at its best. Mountain laurel reaches its best development in North and South Carolina in a few secluded valleys between the Blue Ridge and the western mountains of the Appalachian ranges. The largest specimens are forty or fifty feet high and a foot or a foot and a half in diameter. Trunks are contorted and unshapely, and lumber is never sawed from them.

The tree has many names, most of them, however, are applied to the species in its shrubby form. A common name is simply laurel, but that does not distinguish it from the great laurel which is often associated with it. Calico bush is one of its names, and is supposed to be descriptive of the flowers. Spoonwood is one of its northern names, dating back to the times when early settlers, who carried little silverware with them to their frontier homes, augmented the supply by making spoons and ladles of laurel roots. Ivy is a common name, sometimes mountain ivy, or poison ivy. Poison laurel and sheep laurel are among the names also. The leaves are poisonous, and if sheep feed on them, death is apt to follow. The exact nature of the poison is not understood. Sheep seldom feed on the leaves, and do so only when driven by hunger. Other names are small laurel, wood laurel, and kalmia. The last is the name of the genus, and is in honor of Peter Kalm, a Swedish naturalist.

The species is found from New Brunswick to Louisiana, but principally among the ranges of the Appalachian mountains. Its thin bark makes it an easy prey to fire and the top is killed by a moderate blaze. The root generally remains uninjured and sends up sprouts in large numbers. Thickets almost impenetrable are sometimes produced in that way.

Flowers and foliage of mountain laurel are highly esteemed as decorations, foliage in winter, and the flowers in May and June. The bloom appears in large clusters, and various colors are in evidence, white, rose, pink, and numerous combinations. The seeds are ripe in September, and the pods which bear them burst soon after.

The wood of mountain laurel weighs 44.62 pounds per cubic foot. It is hard, strong, rather brittle, of slow growth, brown in color, tinged with red, with lighter colored sapwood. This description applies to the wood of the trunk; but in nearly all cases where mention is made of the wood of this tree, it refers to the roots. These consist of enlargements or stools, often protruding considerably above the ground. If the area has been visited repeatedly by fire, the roots are generally out of proportion to the size of the tops. In that respect they resemble mesquite, except that the enlarged root of mesquite penetrates far beneath the surface while that of mountain laurel remains just below the surface or rises partly above it.

The utilization of mountain laurel is not confined to the trunks which reach tree size. Generally it is the root that is wanted. Roots are usually sold by weight, because of the difficulty of measuring them as lumber or even by the cord. The annual product of this material in North Carolina alone amounts to about 85,000 pounds, all of which goes to manufacturers of tobacco pipes and cigar holders. The use of the laurel root for pipes is as old as its use for spoons. Pioneers who raised and cured their own tobacco smoked it in pipes which were their own handiwork. The laurel root was selected then as now because it carves easily, is not inclined to split, does not burn readily, and darkens in color with age. It is cheap material, is found throughout an extensive region, and the supply is so large that exhaustion in the near future is not anticipated.

The wood is employed in the manufacture of many small articles other than tobacco pipes. Paper knives, small rulers, turned boxes for pins and buttons, trays, plaques, penholders, handles for buckets, dippers, and firewood, are among the uses for which laurel is found suitable.

It is of no small importance for ornamental purposes, and is often seen growing in clumps and borders in public parks and private yards, where its evergreen foliage and its bloom make it a valuable shrub. It is planted in Europe as well as in this country.

Great Laurel (Rhododendron maximum) is also in the heath family. More than two hundred species of rhododendron are known, and seventeen are in this country, but only one attains tree size. The generic name means “rose tree,” and the name is well selected. The flowers are the most conspicuous feature belonging to this species, and few wild trees or shrubs equal it for beauty. It is not native much west of the Alleghany mountains, but grows north and east to Nova Scotia. It is at its best among the mountains, thrives in deep ravines where the shade is dense, and on steep slopes and stony mountain tops. It forms extensive thickets which are often so deep and tangled that it is difficult to pass through them. This laurel is seldom found growing on limestone. It reaches its largest size in the South. Trees thirty or forty feet high and a foot in diameter occur in favored localities. It grows on the Alleghany mountains in West Virginia at an elevation exceeding 4,000 feet and there forms vast thickets. Some use is made of the wood for engraving blocks and as tool handles. It is hard, strong, brittle, of slow growth, and light clear brown. It is frequently planted in parks in this country and Europe, and three or more varieties are distinguished in cultivation. This laurel’s leaves have a peculiar habit of shrinking and rolling up when the thermometer falls to zero or near it. Among the names applied to it are great laurel, rose bay, dwarf rose bay tree, wild rose bay, bigleaf laurel, deer tongue, laurel, spoon hutch, and rhododendron.

Catawba Rhododendron (Rhododendron catawbiense) is a rare, large-flowered species of the mountain regions from West Virginia southward to Georgia and Alabama. The wood is not put to use, and the species is chiefly valuable as an ornamental shrub. It seldom reaches large size.

Sourwood (Oxydendrum arboreum) follows the Alleghany mountain ranges south from Pennsylvania, and extends into Florida, reaching the Atlantic coast in Virginia, and Indiana, Tennessee, and Louisiana westward. The best development of the species is found among the western slopes of the Big Smoky mountains in Tennessee. It is called sorrel-tree, sour gum, and sour gum bush, on account of the acidity of the leaves when chewed. Arrow-wood, another name, refers to the long, straight stems between the whorls of branches of young trees—those three or four feet high. The stems are of proper size for arrows, and amateur bowmen use them. Those who designate the tree as lily-of-the-valley have in mind the flowers. The shape suggests an opening lily, but the size does not. The flower is about one-third of an inch long, but panicles several inches long are covered with them. They open in July and August, and in September the fruit is ripe. The seed is pale brown and one-eighth of an inch long.

The sourwood tree at its best is fifty or sixty feet high and from twelve to eighteen inches in diameter. The bark of young trees is smooth, but on mature trunks it resembles the exceedingly rough bark of an old black gum. In fact, many people suppose this tree to be black gum, never having noticed the difference of leaf, fruit, and flower. The genus consists of a single species. The wood is heavy, hard, compact, and it takes good polish. The medullary rays are numerous, but thin, and they contribute little or nothing to the figure of the wood. The annual rings show little difference between springwood and summerwood, and consequently produce poor figure when the lumber is sawed tangentially. The pores are many and small and are regularly distributed through the yearly ring. Heartwood is brown, tinged with red, the sapwood lighter. The strength and elasticity of sourwood are moderate. The wood is made into sled runners in some of the mountain districts where it occurs, but no particular qualities fit it for that use. It is occasionally employed for machinery bearings. It has been reported for mallets and mauls, but since it is not very well suited for those articles, the conclusion is that those who so report it have confused it with black gum which it resembles in the living tree, but not much in the wood. Small handles are made of it, and it gives good service, provided great strength and stiffness are not required. Sourwood is not abundant anywhere, and seldom are more than a few trees found in a group.